A drum washing machine (1) including a cabinet (2), a tub (3) disposed at an inside of the cabinet, a drum (4) rotatively disposed at an inside of the tub (3), a condensing duct (40) configured to condense moisture in air that is introduced from an inside of the drum (4), and a drying duct (20) configured to heat air being introduced from the condensing duct to supply the heated air to an inside of the drum, wherein the condensing duct (40) is coupled to a rear of the tub (3), while the drying duct (20) is positioned at an upper portion of the condensing duct and is coupled to the cabinet (2), and in between the condensing duct and the drying duct, a buffer coupling member (30) configured to mediate the condensing duct and the drying duct is provided.
